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Slide 2: the circle on the right will gradually disappear as progressively lighter rings appear around it 2.

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Presentation on theme: "Slide 2: the circle on the right will gradually disappear as progressively lighter rings appear around it 2."— Presentation transcript:

1 Slide 1: the areas within the two red circles are the same shade of grey

2 Slide 2: the circle on the right will gradually disappear as progressively lighter rings appear around it 2

3 Slide 3: as slide 2, but the grey background appears only at the end of the sequence

4 Slide 4: as slide 2, but the rings converge inwards instead of spreading outwards

5 Slide 5: the chessboard illusion; the small circles are all the same shade, although they look very different

6 Slide 6: the chessboard illusion; a small chunk migrates from one circle to another, to demonstrate that they are the same shade

7 Slide 7: another chessboard illusion; the black square in light and the white square in shadow are the same shade; this is demonstrated by a bar that extends from one to the other


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